nuon.nl

Checked 22 October 2026, 15:01 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 3 info

Registration

info

.nl country-code

Found

TLD
.nl (country-code)
ICANN policies apply
no
Lookup error: https://rdap.sidn.nl/domain/nuon.nl returned HTTP 429

Checks

  • i
    .nl is a country-code TLD (ccTLD)
    Country-code TLD: governed by its local registry under national policy, not by an ICANN contract. Registrar accreditation, dispute resolution and RDAP/WHOIS rules are set by the registry.
    #1
  • ✓ TLD delegated and signed #2
    .nl is delegated in the root zone and DNSSEC-signed.
  • i
    Could not be checked
    The RDAP lookup failed, so this could not be checked: https://rdap.sidn.nl/domain/nuon.nl returned HTTP 429
    #3

Delegation

warn

ns1.ndc.nuon.com, ns1.vattenfall.de, ns1.vattenfall.se, ns2.ndc.nuon.com, ns2.vattenfall.de, ns2.vattenfall.se

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns1.ndc.nuon.com, ns1.vattenfall.de, ns1.vattenfall.se, ns2.ndc.nuon.com, ns2.vattenfall.de, ns2.vattenfall.se
NS in the zone
ns1.ndc.nuon.com, ns1.vattenfall.de, ns1.vattenfall.se, ns2.ndc.nuon.com, ns2.vattenfall.de, ns2.vattenfall.se
NameserverAddressesNetwork (AS)Glue
ns1.ndc.nuon.com194.53.167.100AS59543 NUON-AS - Vattenfall N.V., NL-
ns1.vattenfall.de91.192.15.4AS42274 VATTENFALL-AS - Vattenfall Europe Information Services GmbH, DE-
ns1.vattenfall.se151.156.253.254AS205664 VATTENFALL-AB - Vattenfall AB, SE-
ns2.ndc.nuon.com194.53.167.101AS59543 NUON-AS - Vattenfall N.V., NL-
ns2.vattenfall.de91.192.15.5AS42274 VATTENFALL-AS - Vattenfall Europe Information Services GmbH, DE-
ns2.vattenfall.se151.156.253.253AS205664 VATTENFALL-AB - Vattenfall AB, SE-

Checks

  • ✓ 6 nameservers #6
    Delegated to ns1.ndc.nuon.com, ns1.vattenfall.de, ns1.vattenfall.se, ns2.ndc.nuon.com, ns2.vattenfall.de, ns2.vattenfall.se.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ No glue needed #8
    All nameservers are outside the zone, so no glue records are needed.
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 3 IPv4 /24s and 0 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS205664 (VATTENFALL-AB - Vattenfall AB, SE): 2 addresses; AS42274 (VATTENFALL-AS - Vattenfall Europe Information Services GmbH, DE): 2 addresses; AS59543 (NUON-AS - Vattenfall N.V., NL): 2 addresses.
  • ✓ Nameserver names under 3 TLDs #12
    Nameserver names use the TLDs .com, .de, .se.
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

pass

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.ndc.nuon.com 194.53.167.100NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns1.vattenfall.de 91.192.15.4NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns1.vattenfall.se 151.156.253.254NOERROR, 29 ms, authoritativenoyes / yesrefused-
ns2.ndc.nuon.com 194.53.167.101NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns2.vattenfall.de 91.192.15.5NOERROR, 12 ms, authoritativenoyes / yesrefused-
ns2.vattenfall.se 151.156.253.253NOERROR, 32 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 6 nameserver addresses answered.
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✓ No recursion #16
    The nameservers do not answer recursive queries for other domains.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✓ TCP supported #19
    All nameservers answer over TCP.
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 2024120549 · primary ns1.vattenfall.se

Found

Primary (MNAME)
ns1.vattenfall.se
Contact (RNAME)
hostmaster.vattenfall.com
Serial
2024120549
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
ns1.ndc.nuon.com (194.53.167.100)2024120549
ns1.vattenfall.de (91.192.15.4)2024120549
ns1.vattenfall.se (151.156.253.254)2024120549
ns2.ndc.nuon.com (194.53.167.101)2024120549
ns2.vattenfall.de (91.192.15.5)2024120549
ns2.vattenfall.se (151.156.253.253)2024120549

Checks

  • ✓ Serial 2024120549 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 15m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.vattenfall.se is one of the listed nameservers.
  • ✓ Contact hostmaster@vattenfall.com #25
    The SOA RNAME hostmaster.vattenfall.com means hostmaster@vattenfall.com.
  • ✓ Date-based serial #26
    The serial 2024120549 follows the YYYYMMDDnn convention (2024-12-05).

DNSSEC

warn

Not signed

Found

Validated by resolver
no

Checks

  • !
    Not signed
    The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.
    #27

Records

info

14 records at the apex

Found

Read from
194.53.167.100:53
TypeValueTTL
SOAns1.vattenfall.se. hostmaster.vattenfall.com. 2024120549 28800 7200 604800 9003600
NSns1.ndc.nuon.com.3600
NSns2.ndc.nuon.com.3600
NSns1.vattenfall.de.3600
NSns1.vattenfall.se.3600
NSns2.vattenfall.se.3600
NSns2.vattenfall.de.3600
A91.192.14.2043600
MX100 mx04.totaal.net.3600
TXT"google-site-verification=uZ73uirBvmBJbES1icNik_nqgPreMwEJwiYvTAmnc7w"3600
TXT"KmHrTrdLLvTpsgSuSh7NynVJtOB24OsclN+Al5qlZmWBdGnKzlYo1qgstR1yg1P7L9FJQgNztKl5FF40X1UDJA=="3600
TXT"GgDaNBNjCnD95JRXvtCDk3cA35sOSsYnUjg+vogufDY="3600
TXT"74f9b74725f0feb4be2fa010e1575a9a4d7f65022b71fd270a53dc38eed669f5"3600
TXT"v=spf1 -all"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, NS 1h.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • i
    No CAA records
    Without CAA records any certificate authority may issue certificates for this domain. A CAA record limits issuance to the CAs you use.
    #35